Indeed! Without those monks, Mace Windu would never have come back in Lando's body for Return of the Jedi!

reposting myself here:Mace's body fell onto a passing speeder which was piloted by B'omar monks who were out for a night of joyriding and heavy drinking on coruscant. Although they were just floating brains in spider droid bodies, they knew they'd found a GREAT brain in this jedi's body (which was near death) and they had to preserve it.

They quickly took Mace's body to their shady mountain retreat on tatooine (where this annoying hutt was constantly throwing parties) and placed his brain in a B'omar droid body. Because Mace was so strong in the force he influenced the creation of this spider droid body and so it was made PURPLE. It also was engraved with "Bad Mother B'omar" on the side so he could be DIFFERENT and also really COOL.

Years later, Spider-Droid-Bad-Mother-B'omar-Mace noticed that Bib Fortuna escaped being a B'omar by putting his brain into the body of Bib's cousin, Bob Fortuna. Mace thought, "Hey if that weak minded, minor character can get such a contrived resurrection, why not the windu?" So he transferred his brain into this undercover rebel operative who was pretending to be a guard named Lando.

Soon everyone noticed that Lando was not such a sleazy, stab-you-in-the-back kind of guy anymore. Of course they made him a general right away. This was especially good since that way he could ignore and countermand every thing Admiral Ackbar would order at the battle of endor.

Then at the ewok celebration, Lando/Mace revealed his true identity as Mace to Chewy. He then used hand gestures to demonstrate to Chewy how one time Palpatine sent him flying out a window.

But the brain transplant did not connect Lando/Mace's motor control completely. And he never could master clapping his hands in time with the Ewok music. The End